Disk-scraper.



A. R. MARKLEY.

DISK SGRAPER. APPLmATIoN FILED SEP'1.',7,1909.

990,576. Patented A111125, 1911.

ML/WMZ@ @raf/ @iff ,.1 l r 'l i I Stroms,

UNITED STATES PATENT oFFioE.

ARTHUR R. MARKLEY, OF ESTHERVILLE, IOWA.

DISK-SCRAPER.

i To all whom 'it may concern:

Be it known that I, ARTHUR R. MARKLEY,

'citizen of the United States, residing at Estherville, in the county of Emmet and State of Iowa, have invented certain new and useful Improvements in Disk-Scrapers,

of which the following is a specification.

Y provision of an arrangement of scrapers upon the harrow lframe whereby a plurality o Scrapers may belactuated simultaneously in order to clear all of the disks of the harrowV atfthe same time and under the Operation ofone lever.

The invention has for'a further object the peculiar disposition of a cutting blade on Athe scralper whereby t-lie same is presented diagona y to the radius of the disk to effect the removal of mud or trash by the exerting of but a slight pressure upon the scraper thereby effecting a mechanism which will 4be relieved of all undue strain during its operation. For a- 4full understanding of the invention and the merits thereof, and 'also vto 'acquire a knowledge of the details of constriictiom' andthe meansfor-'el'ecting the result, reference is toV had kto the following deseri tion and aocoin panyingl dra-wings, in whic 1 Figure 1 is a rearelevation of a fragmentary viewfof the opposite ends of a har-- row :havin the improved Scrapers applied `g. 2 is a transverse 'section nl irOWfl- Sclosing the improved scraper .apL ed t and showing in dotted I ine'sthe Vafter operation;

Vi Fig. 3 is a top..plan view of the improved scraper'. 1 A

CorreSPOlldingand like parts are referred to 4in the following Ic lescription and indi cated in all the views of thedlawing by the same reference characters.

Referring to Ithe' drawings. the numeral 10 designates the frame of a hai-row winch is disclosed in the Ipresent drawings as being formed ofa pair of a|1glc irons arranged Serial No` 516,323.

n parallel and providedwith depending supports 11 in the lower ends of which is journaled a transverse shaft 12. U on the shaft 12 are arranged a plurality -of isks `13 which are disposed in two sets/having their concaved faces turned oppositel and outwardly from one another accor ing to the .side of the frame 10 upon which the same. are mount-ed. The frame 10 is provided with an operating shaft 14 which is formed rectangularly in cross section and. having circularbering faces formed at spaced intervals throughout the same for the reception of the supporting arms 15 which are rearwardly extended from the frame 10.

The operating'sha-ft 14 is provided with a lever 1G which is extended forwardly from an intermediate point of the saine and bei neath the harrow fra-me 10, where the lever' by which the ever 16 is adapted tobe del pressed in order to rotate the shaft 14. The

27.5.' ltiis turned n' waidly to foam 'a pedal IT shaft 14 is provided with a spring 18 mou'nted at a convenient point thereon, preferably at a central point adjacent the lever 16,/

one end of the spring 18 being rigidly connected to the shaft 14, .while theopposite end thereof is extended to the frame 10 and secured thereto; .The jspring 18 is mounted in such. relation to the shaft 14 that the shaft 14 pis normally held ina forwardly rturned position to raise the lever 1 6 -and to Mounted upon the sha-ft 14 are a lurality of scraper blades 19, one for each o the harrow disks. These blades are formed of relatively narrow strips Vof resilient sheet ina'- Vterial bent at ltheir upper ends as at 2O for engagement about the shaft 14 and against the sides thereof to rigidly 'support the hold the pedal 17 in an upward position. i

blades and form 'a U-shaped clip embracing the shaft 1 4, this clipbeing'secured toit-he shaft- 14 by clamping bolts 21. It is to be noted that the upper ends of the blades, are disposed vin a plane'parallel to the plane of the rock shaft. The blades are bowed in form and extend rearward and downward past the edge f of the disk and then are twisted or deflected inward toward the concave face 'o'f vthedisk andtowa'rd the axis thereof. The blades'll) areso twisted that the lower end of each blade is parallel to the face of the harrow disk. At the lower end'thc blade is downwardly bent at approximately a right angle to form an angular terminal portiont is terminal portion disks. 13 is thrown backwardly and is not acting asa scraper and liavinga cutting edge or scrapingvedge substantially horizontal. This downwardly turned portion which forms the scraper is designated 22 and is adapted 'as the disk rotatesto scrape oii' any adhcrin earth or other foreign matter. 'As the dis t rotates this foreign matter scraped off by the scrapinor portion 22 will be carried upward and wil contactwith the bowed face of the scraper and will `be delected by said face, not only upward and outward but alsoV laterally away from the concave face of the disk, thus entirely clearing the disk of foreign matter and preventin the clods ofearth or` mud from again falling uponfthe disk or falling upon the axle thereof and thus clogging.-

In order to operate the scraper the lever 16 'is depressed by means of the pedal 1'( which will cause the blade to move rear-vl wardly and wil-l cause the scraping portion 22 thereof to move radially acrossthe inner face of the -disk so that every portion of the inner face of the disk will be cleaned. Furthermore, it is noted that -by reason of the twist given to the4 spring plate that theiscralping"portion 22 thereof will be' forced resi iently into contact with the inner face of the disk, and that it does not require any manual action in order to force the scraper into contact with the disk.

In 1Fi .1,2 ofthe drawings is disclosed in dotted inesfthe position assumed by the blades 19 when the lever 16 is depressed, and

it 'will be noted that-the cutting edge 22` travels substantially radially from the centerfof the disk and is engaged constantly against the concaved side of the same owing to the resilicnt'formation of the blades 19.

VThe'scrapingplate or portion 22 assumes thediagn'al position shown in dotted lines,

. during the turning ofthe shaft14 and thus presents. acutting edge which has the advantage of a vsliding side movement, thereby insuring the dislodging' of the adhesive substances engagcdupn the disks,

' Thefeature of curvin the blades substantially cir'cularl ltowar the 'center iof' Athe disksisbelieve to be a decided advanta e,

insom'uch that the matter collected upon t e y permitted 'tordrop upon the disks vfrom above,- as is common. with the `Scrapers" now A4iii use, wherebyA the clogging of the disks is by-the curvature of the blades 1 9. Having thus described the invention wha is claimed as new is:

eliminatedas the.. mud or' trash is deiected 1. The combinatiqn with a c'soncavofzorby vex harrow disk and a frame supported thereon, of a scraper therefor comprising a rock shaft mounted on the fra-me, a lever for oscillating 4the rock shaft and a resilient blade, the upper end of which is kattached to the rock lshaft and is disposed in a plane arallel to the axis of the disk, said blade. icing bowed rearward and then inward toward the concave face of the disk, the lower porti-on of the blade being twisted relatively to the up er portion and the lower extremity of the lade being angular-ly bent to afford a vfiat terminal scrapin Vmember contacting with the inner face .o the disk and having a sera ing edge extending ap'- proximately radia to the disk; 1

2. The combination with a 'concavo-convex vliarrow disk and a fraine supported thereon, of a scraper comprisin a rock shaft mounted on the frame, a ever for moving the rock shaft, and a resilient blade,

.the upper end of which is attached to the rock shaft, said upper end being disposed in a plane parallel tothe axis of the disk, said blade being bowed rearward. and extended toward the central' ortion of the disk'and being gradually twisted to bring its lower' end into contact with the face ofthe central `portion of the disk, the lower end of the,

blade being formedvwith a scraper whose' edge extends approximately` radial to the disk, the upper end of the blade being lat'- erally adjustable upon the rock shaft,"

whereby tlie'pressure of the scraper agai'nst'- l the barrow disk may be'adjusted.

3. The combination with a concavo-c'uu- Vex harrow disk and .a frame supported thereon, of a scraperv 'comprisiri a rockv Shaft mounted on thefr'ame, a ev'er for moving the rock lshaft, anda resilient blade, the upper .end of which is bentto form ya ioo clip engaging'over the 'rock shaft, said upi' per end lbein disposed in a plane4 arallel to' thev axis of t e disk, theblade being bowed.;

rearwarda'nd then ext ding'inward-toward the central portion of he tdisk and being gradually twisted to bring it lower end into contactwith-.the face of th -'disk,.the lower end of the blade being bent--into'aplaneap" j..

`'proximately parallel tothe planeo the. disk to form a scraper having an edge extending to the disk, and aap roximatly radiall heft lie cli formed at the passing through t upper end4 of the scraper an adjustably'e'nga ing the scraper upon the rock shaft.

n testimon whereof I aiix'my signature in presence o two witnesses. ,A ARTHUR R. MARKLEY. [L.s.]' Witnesses: P. H. PAUILSEN,

BYRoN M. CooN. 

